A thermionic effect infrared detector

By designing a thermionic effect infrared detector and utilizing the photothermoelectric conversion of lead salt semiconductor thin films and metal structures, the problems of high cost, need for cooling, and slow response speed of infrared detectors have been solved, realizing a low-cost, easy-to-produce high-performance infrared detector.

CN115579402BActive Publication Date: 2026-07-21NANCHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANCHANG UNIV
Filing Date
2022-10-10
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing infrared detectors suffer from high cost, complex manufacturing processes, the need for cooling, slow response speed, and limited spectral response range, and their performance is unstable, especially in extreme environments.

Method used

The infrared detector employs thermionic effect, including an infrared detection chip, a socket, and a cap. It utilizes a structural design of lead salt semiconductor thin film, metal conductive electrode, passivation layer, and metal reflective layer to achieve detection through self-driven photothermoelectric conversion, avoiding cooling and simplifying the packaging process.

Benefits of technology

This has resulted in a low-cost, easily mass-producible infrared detector that can operate at room temperature, has an ultra-high response speed and a wide spectral response range, and improves the reliability and stability of the detector.

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Abstract

The application discloses an infrared detector with thermoelectron effect, which comprises an infrared detecting device, a tube base, and a tube cap, wherein the infrared detecting device comprises a substrate, a lead salt semiconductor thin film, a metal conductive electrode, a passivation layer, and a metal reflecting layer; the substrate of the infrared detecting device is fixed in the center of the tube base by using insulating glue; and the metal conductive electrode is welded to the pin of the tube base by using a metal wire. The infrared detector has the advantages of simple structure, material saving, direct wire welding, normal operation at room temperature without refrigeration, and facilitation of mass production.
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